Sunshine recorder

File:Heliograph wendelstein 2002 00a.jpg

A Campbell–Stokes sunshine recorder

A sunshine recorder is a device that records the amount of sunshine at a given location. The results provide information about the weather and climate as well as the temperature of a geographical area. This information is useful in meteorology, science, agriculture, tourism, and other fields. It has also been called a heliograph.

There are two basic types of sunshine recorders. One type uses the sun itself as a time-scale for the sunshine readings. The other type uses some form of clock for the time scale.

File:Sunshine recorders.jpg

A Jordan sunshine recorder (left). The other instrument is a Marvin sunshine recorder.

Older recorders required a human observer to interpret the results; recorded results might differ among observers. Modern sunshine recorders use electronics and computers for precise data that do not depend on a human interpreter. Newer recorders can also measure the global and diffuse radiation.

See also

• Global dimming

External links

• Pictures of the papers produced by a Sunlight Recorder
• Blake-Larsen Sunlight Recorder
• Komoka Sunrecorder Current Images